When operating properly, the Permeate Pump will click once every 2-4 seconds. When the pump clicks, it is forcing the pure water into the tank and forcing the brine water into the drain. If your system is no longer filling the tank, or you no longer hear the pump clicking, you may have clogged filters or a defective permeate pump.

The instructions will guide you in determining if the pump is defective.Â Please use the the diagramÂ for reference.

Turn off the feed water line to the RO unit, by shutting off the needle valve or main water line.

Close off the tank by turning the blue cap on the tank ball valve 90 degrees. Read more

The most common cause for slow-shut-off is insufficient input water pressure. RO needs sufficient input pressure to shut off promptly. If the Ro system runs for an excessive amount of time (6-7) hours, but will eventually shut down, please review the possible factors below.

Input water pressure is too low (below 40psi). Not enough pressure to shut off RO promptly > Check input water pressure. If pressure is low, boost house pressure or add pump to RO. Please contact an APEC Representative for support. Read more

If you are experiencing a bad taste in the Pure Water, the RO Membrane or Stage 5 Carbon filter maybe depleted and needs to be replaced. Please follow the steps below to determine if the membrane and or stage 5 carbon filter needs to be replaced.

Fill up a clean cup of water from the RO Unit.

Take a Pure Water TDS reading with the supplied TDS Digital Meter that came with the RO unit. Read more

If the Booster Pump system is not filling up the tank, the Filters may be clogged or the Pump ESO (electronic shutoff valve) may be faulty. Please follow the steps below to determine what may be clogged on the booster pump unit.Â Â

Please follow these steps:Â

Shutoff the feed water to the RO unit.

Turn off the tank ball valve by turning the blue cap 90 degrees on the tank ball valve. Read more

If you are experiencing a leak with any of the Pre Filter housings on the Reverse Osmosis System, the Rubber O Ring maybe defective. The filter housing must have an O Ring in order to seal properly. Please review the steps below to address a leaking filter housing.

Please follow the steps below:

Shut off the feed water line to the RO unit. Turn off the tank ball valve, by turning the Blue Cap on the tank ball valve 90 degrees.

The APEC RO unit comes standard with a 1/2″ Chrome Feed Water Adapter. Most under-sink pipe size is 1/2″, but some may be a special 3/8â€ size. If the supplied 1/2″ feed water adapter is too big, you may need to use a 3/8″ feed water adapter.

If you are not able to find this component at your local hardware store, please contact an APEC Representative to obtain the 3/8″ feed water adapter.